9335040

Appears in sequences

• a(n) = 12*(n+1)*binomial(n+3,9).at n=9A027794
• a(n) = 55*(n+1)*binomial(n+3,11)/3.at n=7A027796
• Number of pairs of orthogonal (-x,y) vectors of length 1*(x+y), where x/y is the n-th rational <= 1, ordered first by y and then x, e.g. 1/1, 1/2, 1/3, 2/3, 1/4, 3/4 ...at n=27A225986